The 2007 email from Jobs to Schmidt was disclosed on Friday in the course of civil litigation against Apple Inc, Google Inc and five other technology companies. The proposed class action, brought by five software engineers, accuses the companies of conspiring to keep employee compensation low by eliminating competition for skilled labor.

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According to an unredacted court filing made public in the civil litigation on Friday, the now-deceased Jobs emailed Schmidt in March 2007 about an attempt by a Google employee to recruit an Apple engineer. Schmidt was also an Apple board member at the time.

"I would be very pleased if your recruiting department would stop doing this," Jobs wrote.